Calculator



FIG. 1 is a top plan view of a calculator showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a top, front and right side perspective view thereof in an extended position.

The broken line showing of cards in FIGS. 1-4 and 7 and a keyboard in FIG. 7 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a calculator, shown and described. 